—How did she get infected? —She ____ the viruses without any protection.
#101750
A
exposed to
B
had exposed to
C
was exposed to
D
has exposed to
推荐题目
________ repeatedly, the problem still appeared in the beginners’ homework.
#100762
A
Explaining
B
Having explained
C
Having been explained
D
To be explained
My sister ______ interested in math after ______ long talk with her last September.
#103326
A
has become; my
B
became; mine
C
is; I
D
is; my
—I wonder if you could go with me to the supermarket.—Sorry. I _______ my experiment report all the morning and haven’t finished yet.
#101229
A
write
B
was writing
C
have written
D
have been writing
The teacher said that Columbus _______America in 1492.
#102954
A
discovered
B
found
C
had discovered
D
had found